The present disclosure relates to an adapter assembly for electrically and mechanically interconnecting electromechanical surgical devices and surgical loading units. The adapter assembly includes an articulation assembly having a rotatable drive shaft having a proximal end rotatable by a surgical device and a distal end having a gear with external teeth, a gear nut including external gear teeth meshingly engaged with the external teeth of the gear, a screw disposed within the gear nut and including external threads engaged with internal threads of the gear nut such that the screw is axially moveable relative to the gear nut, and an articulation bar operably coupled to the screw such that axial movement of the screw results in corresponding axial movement of the articulation bar.
